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1 February 2010 Hearbeat 3.0.2 released see the Release Notes

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Last site update:
2017-12-17 09:35:28

mcast - configures multicast communication path

The mcast directive is used to configure a multicast communication path.

The syntax of an mcast directive is:

mcast dev mcast-group udp-port ttl 0
  • dev - IP device to send/rcv heartbeats on

  • mcast-group - multicast group to join (class D multicast address 224.0.0.0 - 239.255.255.255). For most Heartbeat uses, the first byte should be 239.

  • port - UDP port to sendto/rcvfrom (set this to the same value as udpport)

  • ttl - the ttl value for outbound heartbeats. This affects how far the multicast packet will propagate. (0-255). Set to 1 for the current subnet. Must be greater than zero.

A sample mcast directive is shown below:

mcast eth0 239.0.0.1 694 1 0

Bugs

This directive has a few more parameters than it should.

See Also

Wikipedia, The TCP/IP guide